Nuclear biochemical instrument battery compartment sealing cover convenient to disassemble and nuclear biochemical instrument

Abstract

The utility model discloses a nuclear biochemical instrument battery compartment sealing cover convenient to disassemble and a nuclear biochemical instrument. The sealing cover comprises a square sealing cover body. The periphery of the square sealing cover body is provided with an annular extending part perpendicular to the surface of the square sealing cover body, and the outer surface of the annular extending part is provided with an annular groove used for arranging a sealing ring. The two opposite edges of the square sealing cover body are each provided with a mounting part in a connected mode, and threaded holes are formed in the mounting parts. A quick release screw; the quick-release screw comprises a nut and a screw fixedly connected with the nut, and the diameter of a thread part of the screw is larger than that of the optical axis; the threaded part of the quick-release screw is matched with the threaded hole of the mounting part of the square sealing cover body, so that the optical axis of the quick-release screw is arranged in the threaded hole of the mounting part in a sleeving manner; a retainer ring for a shaft; the shaft check ring is provided with a central through hole matched with the optical axis of the quick release screw and a check ring mounting hole communicated with the central through hole; and the central through hole of the shaft check ring is arranged on the optical axis of the quick release screw in a sleeving manner through the mounting hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of nuclear, biological and chemical detection, and particularly relates to a battery compartment sealing cover of a nuclear, biological and chemical instrument which is convenient to disassemble and a nuclear, biological and chemical instrument. Background Art

[0002] The dose rate monitor is a widely used nuclear instrument, and the neutron dose rate meter is a nuclear instrument for monitoring neutrons. Nuclear, biological and chemical instruments are usually equipped with batteries as power sources.

[0003] At present, the sealing structure of the battery end cover of nuclear, biological and chemical instruments generally adopts end face sealing or axial sealing. The end face sealing structure requires more fastening points. Generally, the fastening points of a square rear cover are not less than 4, which is not convenient for installation and disassembly; the axial sealing can achieve a better sealing effect, and the number of fastening points can be 2. However, if the axial sealing effect is good, the end cover is not convenient to disassemble, and if it is convenient to disassemble, the axial sealing effect is not good. Summary of the Utility Model

[0004] In view of this, some embodiments disclose a battery compartment sealing cover of a nuclear, biological and chemical instrument which is convenient to disassemble. The sealing cover includes:

[0005] A square sealing cover body; a peripheral edge of the square sealing cover body has an annular extension perpendicular to its surface, and an annular groove is provided on an outer surface of the annular extension; the annular groove is used for arranging a sealing ring; each of two opposite sides of the square sealing cover body is provided with an installation part, and a threaded hole is arranged on the installation part;

[0006] A quick-release screw; the quick-release screw includes a nut and a screw fixed to the nut. The screw has a smooth shaft and a threaded part arranged at an end of the smooth shaft. The outer diameter of the threaded part is larger than the outer diameter of the smooth shaft; the threaded part of the quick-release screw is adapted to the threaded hole of the installation part of the square sealing cover body for sleeving the smooth shaft of the quick-release screw in the threaded hole of the installation part;

[0007] A shaft retaining ring; the shaft retaining ring has a central through hole adapted to the smooth shaft of the quick-release screw and a retaining ring installation hole communicated with the central through hole; the shaft retaining ring is arranged to sleeve the central through hole of the shaft retaining ring on the smooth shaft of the quick-release screw through the retaining ring installation hole.

[0008] Further, for the battery compartment sealing cover of a nuclear, biological and chemical instrument which is convenient to disassemble disclosed by some embodiments, the installation part is arranged on a short side of the square sealing cover body.

[0009] For the battery compartment sealing cover of a nuclear, biological and chemical instrument which is convenient to disassemble disclosed by some embodiments, the installation part is arranged in the middle of a side of the square sealing cover body.

[0010] For the battery compartment sealing cover of a nuclear, biological and chemical instrument which is convenient to disassemble disclosed by some embodiments, the length of the smooth shaft of the quick-release screw is greater than the length of the threaded part.

[0011] In some embodiments, the seal cover of the battery compartment of the nuclear, biological and chemical instrument that is easy to disassemble is disclosed. The optical axis of the quick-release screw is integrally dumbbell-shaped. The middle part of the dumbbell-shaped optical axis is the installation part for the shaft retaining ring, which is used to sleeved with the shaft retaining ring.

[0012] On the other hand, some embodiments disclose a nuclear, biological and chemical instrument, including a seal cover of the battery compartment of the nuclear, biological and chemical instrument that is easy to disassemble.

[0013] Furthermore, some embodiments disclose a nuclear, biological and chemical instrument, which further includes a battery compartment adapted to the seal cover of the battery compartment of the nuclear, biological and chemical instrument that is easy to disassemble.

[0014] Some embodiments disclose a nuclear, biological and chemical instrument. The battery compartment has a threaded mounting hole adapted to the quick-release screw, and a concave structure adapted to the shaft retaining ring is provided around the threaded mounting hole.

[0015] Some embodiments disclose a nuclear, biological and chemical instrument. A flexible gasket is provided between the quick-release screw and the seal cover of the battery compartment.

[0016] The seal cover of the battery compartment of the nuclear, biological and chemical instrument disclosed in the embodiments of the present invention realizes the sealing of the battery compartment of the nuclear, biological and chemical instrument and the quick installation of the seal cover of the battery compartment through two installation parts. The structure is simple, the sealing effect is good, the disassembly is convenient, and the practicability and safety of the nuclear, biological and chemical instrument are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the seal cover of the battery compartment disclosed in some embodiments;

[0018] Figure 2 It is a schematic structural diagram of the seal cover of the battery compartment disclosed in some embodiments Figure 2 ;

[0019] Figure 3 It is a schematic diagram of the quick-release screw disclosed in some embodiments Figure 1 ;

[0020] Figure 4 It is a schematic diagram of the quick-release screw disclosed in some embodiments Figure 2 ;

[0021] Figure 5 It is a schematic diagram of the shaft retaining ring disclosed in some embodiments;

[0022] Figure 6 It is a schematic diagram of the sealed connection of the seal cover of the battery compartment disclosed in some embodiments;

[0023] Figure 7 It is a schematic diagram of the quick-release screw disclosed in some embodiments Figure 3 .

[0024] REFERENCE SIGNS

[0025] 1 Square sealing cover body 2 Quick-release screw

[0026] 3 Retaining ring for shaft 4 Sealing washer

[0027] 5 Flexible gasket 11 Mounting part

[0028] 12 Annular extension part 111 Threaded hole

[0029] 121 Annular groove 20 Nut

[0030] 21 Smooth shaft 22 Threaded part

[0031] 23 Nut collar 30 Central through hole

[0032] 31 Retaining ring mounting hole 100 Housing

[0033] 210 Retaining ring mounting part for shaft Detailed implementation manner

[0034] Here, for the special term "embodiment", any embodiment described as "exemplary" does not have to be construed as superior to or better than other embodiments. For the performance index test in the embodiments of the present invention, unless otherwise specified, the conventional test methods in the art are adopted. It should be understood that the terms described herein are only for describing specific embodiments and are not used to limit the content disclosed in the embodiments of the present invention.

[0035] Unless otherwise specified, the technical and scientific terms used herein have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present invention belongs; other test methods and technical means not specifically noted in the present invention refer to the experimental methods and technical means commonly adopted by those of ordinary skill in the art.

[0036] As used herein, the terms "substantially" and "about" are used to describe minor fluctuations. For example, they can refer to less than or equal to ±5%, such as less than or equal to ±2%, such as less than or equal to ±1%, such as less than or equal to ±0.5%, such as less than or equal to ±0.2%, such as less than or equal to ±0.1%, such as less than or equal to ±0.05%. Numerical data presented or expressed in a range format herein is used only for convenience and brevity and should therefore be interpreted flexibly to include not only the values expressly listed as the bounds of the range but also all individual values or sub-ranges included within that range. For example, a numerical range of "1 - 5%" should be interpreted to include not only the expressly listed values of 1% to 5% but also individual values and sub-ranges within the indicated range. Thus, individual values such as 2%, 3.5%, and 4% and sub-ranges such as 1% - 3%, 2% - 4%, and 3% - 5% etc. are included within this numerical range. This principle also applies to ranges that list only one numerical value. In addition, such an interpretation applies regardless of the width of the range or the characteristics described.

[0037] As used herein, nuclear, biological, and chemical (NBC) instruments refer to instruments commonly used for inspection and detection in the NBC field, including instruments and equipment for inspecting and detecting nuclear radiation, chemical agents, and biological agents, such as surface contamination detectors, portable nuclide identifiers, wound contamination detectors, Raman analyzers for trace toxic substances, aerosol continuous monitors, neutron dose rate meters, etc.

[0038] As used herein, including in the claims, conjunctive words such as "comprising", "including", "carrying", "having", "containing", "involving", "accommodating", etc. are understood to be open-ended, that is, meaning "including but not limited to". Only the conjunctive words "consisting of" and "composed of" are closed conjunctive words.

[0039] To better illustrate the content of the present utility model, numerous specific details are given in the following specific embodiments. Those skilled in the art should understand that the present utility model can also be implemented without certain specific details. In the embodiments, some methods, means, instruments, equipment, etc. well-known to those skilled in the art are not described in detail in order to highlight the gist of the present utility model.

[0040] On the premise of no conflict, the technical features disclosed in the embodiments of the present utility model can be combined arbitrarily, and the obtained technical solutions belong to the content disclosed in the embodiments of the present utility model.

[0041] In some embodiments, a battery compartment sealing cover of an NBC instrument that is easy to disassemble includes:

[0042] A square sealing cover body; the periphery of the square sealing cover body has an annular extension perpendicular to its surface, and an annular groove is arranged on the outer surface of the annular extension; the annular groove is used to set a sealing ring; two opposite sides of the square sealing cover body are respectively provided with a mounting portion connected thereto, and a threaded hole is arranged on the mounting portion; usually, the square sealing cover body has a shape adapted to the battery compartment of the neutron dose rate meter, and further, extensions perpendicular to its surface are arranged at appropriate positions on the four sides of the square sealing cover body, and the extensions are sequentially connected to the annular extension so that they can be arranged to extend into the battery compartment and fit with the inner wall of the battery compartment; at the same time, an annular groove is arranged on the outer surface of the annular extension, and usually the outer surface of the annular extension fits with the inner wall of the battery sealing compartment The battery compartment is sealed with a sealing ring, which is arranged in an annular groove opposite to the inner wall of the battery sealing compartment. After a sealing ring is arranged in the annular groove, the sealing ring is located between the annular extension part and the inner wall of the battery compartment, thereby increasing the sealing performance between the two, ensuring that a closed space is formed in the battery compartment, and improving the safety of the battery; an installation part is arranged at the end corresponding to the edge of the square sealing cover body, and the installation part extends outward from the edge along the surface direction of the square sealing cover body. When the battery sealing compartment cover is arranged and installed on the battery compartment, the installation part extends to the surface of the instrument housing forming the battery compartment, and the battery sealing compartment cover can be fixed on the instrument housing through the threaded holes arranged on the installation part, thereby forming a firm sealing protection for the battery compartment; correspondingly, an installation threaded hole is also arranged at a position corresponding to the installation part on the instrument housing;

[0043] Quick-release screw; the quick-release screw includes a nut and a screw fixed with the nut, the screw has an optical axis and a threaded portion connected to the end of the optical axis, the outer diameter of the threaded portion is larger than the outer diameter of the optical axis; the threaded portion of the quick-release screw is adapted to the threaded hole of the mounting portion of the square sealing cover body, and is used to sleeve the optical axis of the quick-release screw in the threaded hole of the mounting portion; usually, the threaded portion of the quick-release screw is adapted to the threaded hole of the mounting portion of the square sealing cover body, so that the quick-release screw can be screwed into the threaded hole, and the optical axis diameter of the quick-release screw is smaller than the diameter of the threaded portion, so the square sealing cover body can be sleeved on the optical axis of the quick-release screw through the threaded hole; further, the threaded portion of the quick-release screw can be adapted to the mounting threaded hole provided on the instrument housing, so that the square sealing cover body can be fixedly installed on the instrument housing or on the battery compartment;

[0044] Shaft retaining ring; the shaft retaining ring has a central through-hole adapted to the optical axis of the quick-release screw, and a retaining ring mounting hole communicating with the central through-hole; the shaft retaining ring is arranged to sleave the central through-hole of the shaft retaining ring on the optical axis of the quick-release screw through the mounting hole. Generally, the central part of the shaft retaining ring has a central through-hole adapted to the optical axis of the quick-release screw and a retaining ring mounting hole for sleaving the shaft retaining ring on the optical axis; after the quick-release screw is adaptively installed with the battery sealing hatch cover body, the threaded hole of the battery sealing cover body is sleaved on the optical axis, and then the shaft retaining ring can be installed on the optical axis close to the threaded part, and then the square sealing cover body, the quick-release screw and the shaft retaining ring form an integral assembly; this sealing cover integral assembly can be installed on the battery compartment of the instrument to seal and protect the battery compartment.

[0045] When installing the battery compartment sealing cover, set the sealing ring in the annular groove, and screw the quick-release screw into the mounting threaded hole provided on the battery compartment / instrument housing to complete the installation; for the installed battery compartment sealing cover, the sealing ring fits tightly with the inner wall of the battery compartment and has sufficient resistance to form a seal for the battery compartment; when disassembling the battery compartment sealing cover, only need to screw out the quick-release screw. During the process of screwing out the quick-release screw, the shaft retaining ring moves outward under the action of the threaded part of the quick-release screw. The shaft retaining ring arranged between the mounting part of the square sealing cover body and the threaded part of the quick-release screw prevents the threaded part from entering the mounting part, so that the battery sealing hatch cover body moves outward under the push of the quick-release screw, easily overcomes the resistance between the sealing ring and the inner wall of the battery compartment, and conveniently disassembles the battery compartment sealing cover.

[0046] For the easily detachable battery compartment sealing cover of the nuclear, biological and chemical instrument disclosed in some embodiments, the mounting part is arranged on the short side of the square sealing cover body.

[0047] For the easily detachable battery compartment sealing cover of the nuclear, biological and chemical instrument disclosed in some embodiments, the mounting part is arranged in the middle of the side of the square sealing cover body.

[0048] For the easily detachable battery compartment sealing cover of the nuclear, biological and chemical instrument disclosed in some embodiments, the length of the optical axis of the quick-release screw is greater than the length of the threaded part.

[0049] For the easily detachable battery compartment sealing cover of the nuclear, biological and chemical instrument disclosed in some embodiments, the optical axis of the quick-release screw is generally in a dumbbell shape. The middle part of the dumbbell-shaped optical axis is the shaft retaining ring mounting part for sleaving the shaft retaining ring. Generally, the diameter of the middle part of the dumbbell-shaped optical axis is smaller, and the diameters of the two ends are larger. The smaller-diameter middle part is used as the shaft retaining ring mounting part. After sleaving the shaft retaining ring on the shaft retaining ring mounting part, the larger-diameter parts at both ends of the optical axis can block the shaft retaining ring and fix it on the shaft retaining ring mounting part.

[0050] Some embodiments disclose a nuclear, biological and chemical instrument, including a battery compartment sealing cover. By using the battery compartment sealing cover disclosed in the embodiments of the present invention, the battery compartment of the nuclear, biological and chemical instrument can be well sealed, and it is also convenient to disassemble the battery sealing cover.

[0051] Some embodiments disclose a nuclear, biological and chemical instrument, further including a battery compartment adapted to the battery compartment sealing cover. Generally, a battery compartment adapted to the battery compartment sealing cover is provided in the structure of the nuclear, biological and chemical instrument. The overall shape of the battery compartment is the same as that of the battery compartment sealing cover and has a structure adapted to the battery compartment sealing cover. For example, at appropriate positions on both sides of the battery compartment, there are mounting threaded holes; generally, the mounting threaded holes are located on the housing near the battery compartment of the nuclear, biological and chemical instrument; further, a concave structure is provided around the mounting threaded holes, which can reasonably accommodate a shaft retaining ring.

[0052] Some embodiments disclose that a flexible gasket is provided between the quick-release screw and the battery compartment sealing cover. The flexible gasket can be a rubber gasket, a nylon gasket, etc.

[0053] The following further exemplarily illustrates the technical details in combination with embodiments.

[0054] Figure 1 FIG. is a schematic structural diagram of a battery compartment sealing cover disclosed in some embodiments. The battery compartment sealing cover has a rectangular battery compartment sealing cover body 1. On two opposite short sides of the battery compartment sealing cover body 1, a mounting portion 11 is respectively connected. The mounting portion 11 extends outward along the surface direction of the battery compartment sealing cover body 1, and a threaded hole 111 is provided on the mounting portion 11;

[0055] At a position of the battery compartment sealing cover body 1 close to the edge, an extension portion perpendicular to the surface of the battery compartment sealing cover body 1 is provided. The extension portion extends around the four sides to form an annular extension portion 12. An indented groove is provided on the outer surface of the annular extension portion 12, and an annular groove 121 is formed in the same extension direction as the annular extension portion 12;

[0056] Figure 3 Schematic diagram of a quick-release screw disclosed in some embodiments Figure 1 , Figure 4 Schematic diagram of a quick-release screw disclosed in some embodiments Figure 2The quick-release screw 2 comprises a circular nut 20 and a nut collar 23 sleeved on the nut 20, and the nut collar is movably connected to the nut so that the nut collar can be pulled up and further twisted to rotate the quick-release screw; a relatively long optical axis 21 is arranged on the circular nut 20, and a relatively short coaxial threaded portion 22 is arranged at the end of the optical axis 21, and the diameter of the threaded portion 22 is larger than the diameter of the optical axis 21, and the diameter of the threaded portion 22 is adapted to the threaded hole 111 of the mounting portion 11, so that the quick-release screw can be screwed into the threaded hole on the battery compartment sealing cover, and the battery sealing compartment cover is further sleeved on the optical axis 21 of the quick-release screw; the optical axis of the quick-release screw 2 can move unimpeded in the threaded hole 111; further, a structure adapted to a screwdriver can be arranged on the surface of the annular nut 20, such as a straight groove or a cross groove, so that the quick-release screw can be installed or removed by using a screwdriver;

[0057] Figure 2 Schematic diagram of the battery compartment sealing cover structure disclosed in some embodiments Figure 2 After the quick-release screw 2 is screwed into the threaded hole 111, the battery sealing compartment cover is further sleeved on the optical axis 21 of the quick-release screw 2 through the threaded hole 111, and the shaft retaining ring 3 can be further installed on the optical axis 21. The shaft retaining ring 3 is located between the threaded portion 22 and the mounting portion 11, which can prevent the threaded portion from entering the threaded hole 111 of the mounting portion 11 and then being screwed out therefrom and disengaged, so that the quick-release screw 2 and the square sealing cover body 1 form an integral component;

[0058] Figure 5 Schematic diagram of a shaft retaining ring disclosed in some embodiments; the shaft retaining ring 3 is circular in shape, and a central through hole 30 is provided in the central part thereof so as to be fitted on the optical axis of the quick release screw. At the same time, a retaining ring mounting hole 31 connected to the central through hole 30 is provided on one side of the shaft retaining ring 3 so as to facilitate mounting the shaft retaining ring on the optical axis of the quick release screw or disassembling it from the optical axis; further, an appropriate hollow structure can be provided on the shaft retaining ring so as to keep its center of gravity from shifting. Usually, the hollow structure is opposite to the position of the retaining ring mounting hole.

[0059] Figure 6Schematic diagram of the sealed connection of the battery compartment sealing cover disclosed in some embodiments. When the battery compartment sealing cover is installed on the battery compartment of a nuclear, biological, and chemical instrument, it is usually fixed or connected to each other through the adapter structures provided inside the instrument housing and the battery compartment to achieve the sealing of the battery compartment by the battery compartment sealing cover. As shown in Embodiment 6, a battery compartment is provided on the housing 100 of the neutron dose rate meter. When the battery compartment sealing cover is installed on the battery compartment, the square sealing cover body 1 of the battery compartment sealing cover is flush with the outer surface of the housing 100, and the annular extension 12 enters the inside of the battery compartment and fits tightly between the inner wall of the battery compartment. At the same time, the sealing gasket 4 provided in the annular groove 121 further fits more tightly between the annular extension 12 and the inner wall of the battery compartment, forming a damping effect sufficient to seal the battery compartment; the threaded portion 22 of the quick-release screw 2 is screwed into the installation threaded hole of the battery compartment, and at the same time, the shaft retaining ring 3 is adaptively installed in the concave hole around the installation threaded hole; a flexible gasket 5 is provided between the nut 20 of the quick-release screw 2 and the installation portion 11 to provide appropriate protection for the square sealing cover body 1.

[0060] Figure 7 Schematic diagram of the quick-release screw disclosed in some embodiments Figure 3 Among them, the quick-release screw 2 has a circular nut 20 and a nut collar 23 sleeved on the nut 20. The nut collar is movably connected to the nut so that it can be pulled up to further turn the nut collar to rotate the quick-release screw; a relatively long optical axis 21 is connected to the circular nut 20, and a coaxial and relatively short threaded portion 22 is connected to the end of the optical axis 21. The diameter of the threaded portion 22 is larger than the diameter of the optical axis 21, and the diameter of the threaded portion 22 is adapted to the threaded hole 111 of the installation portion 11 so that the quick-release screw can be screwed into the threaded hole on the battery compartment sealing cover; among them, a shaft retaining ring installation portion 210 is provided in the middle part of the optical axis 21, so that the optical axis 21 is overall in a dumbbell shape, and the diameter of the middle part is smaller than that of both ends. When the shaft retaining ring is sleeved on the shaft retaining ring installation portion 210, the shaft retaining ring can be blocked by the optical axis 21 at both ends of the shaft retaining ring installation portion 210; during the process of disassembling the quick-release screw, the relatively large diameter parts at both ends of the optical axis 21 can act on the shaft retaining ring, which can not only fix the shaft retaining ring on the shaft retaining ring installation portion 210, but also prevent the shaft retaining ring from damaging the threads of the threaded portion 22.

[0061] The battery compartment sealing cover of the nuclear, biological, and chemical instrument that is easy to disassemble disclosed in the embodiments of the present invention realizes the sealing of the battery compartment of the nuclear, biological, and chemical instrument and the quick installation of the battery compartment sealing cover through two installation parts, has a simple structure, good sealing effect, is convenient to disassemble, and improves the practicability and safety of the nuclear, biological, and chemical instrument.

[0062] The technical solutions disclosed in the embodiments of the present utility model and the technical details disclosed in the embodiments are only illustrative explanations of the inventive concept of the present utility model, and do not constitute a limitation on the technical solutions of the embodiments of the present utility model. Any conventional changes, substitutions or combinations made to the technical details disclosed in the embodiments of the present utility model have the same inventive concept as the present utility model and are within the scope of protection of the claims of the present utility model.

Claims

1. A battery compartment sealing cover for nuclear, biological and chemical instruments that is easy to disassemble, characterized in that: The sealing cover comprises: A square sealing cover body; the periphery of the square sealing cover body has an annular extension perpendicular to its surface, and the outer surface of the annular extension is provided with an annular groove; the annular groove is used to set a sealing ring; two opposite sides of the square sealing cover body are respectively provided with a mounting portion, and the mounting portion is provided with a threaded hole; A quick-release screw; the quick-release screw comprises a nut and a screw fixed to the nut, the screw having an optical axis and a threaded portion connected to the end of the optical axis, the outer diameter of the threaded portion being greater than the outer diameter of the optical axis; the threaded portion of the quick-release screw is adapted to the threaded hole of the mounting portion of the square sealing cover body, so as to sleeve the optical axis of the quick-release screw in the threaded hole of the mounting portion; A shaft retaining ring; the shaft retaining ring has a central through hole adapted to the optical axis of the quick-release screw, and a retaining ring mounting hole connected to the central through hole; the shaft retaining ring is configured to sleeve the central through hole of the shaft retaining ring on the optical axis of the quick-release screw through the retaining ring mounting hole.

2. The easily disassembled nuclear, biological and chemical instrument battery compartment sealing cover according to claim 1, characterized in that: The mounting portion is arranged on a short side of the square sealing cover body.

3. The easily disassembled nuclear, biological and chemical instrument battery compartment sealing cover according to claim 1, characterized in that: The mounting portion is arranged at the middle of the side of the square sealing cover body.

4. The easily disassembled nuclear, biological and chemical instrument battery compartment sealing cover according to claim 1, characterized in that: The length of the optical axis of the quick-release screw is greater than the length of the threaded portion.

5. The easily disassembled nuclear, biological and chemical instrument battery compartment sealing cover according to claim 1, characterized in that: The optical axis of the quick-release screw is dumbbell-shaped as a whole, and the middle part of the dumbbell-shaped optical axis is a shaft retaining ring installation part for sleeve-mounting the shaft retaining ring.

6. Nuclear, biological and chemical instrument, characterized in that: The invention comprises the easily disassembled battery compartment sealing cover of nuclear, biological and chemical instrument as claimed in any one of claims 1 to 5.

7. The nuclear, biological and chemical instrument according to claim 6, characterized in that: It also includes a battery compartment adapted to the easily detachable nuclear, biological and chemical instrument battery compartment sealing cover.

8. The nuclear, biological and chemical instrument according to claim 7, characterized in that: The battery compartment has a threaded mounting hole adapted to the quick-release screw, and an inner concave structure adapted to the shaft retaining ring is arranged around the threaded mounting hole.

9. The nuclear, biological and chemical instrument according to claim 8, characterized in that: A flexible gasket is arranged between the quick-release screw and the battery compartment sealing cover.

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